The blanks part. I'd imagine they wouldn't give him a gun capable of great harm outside of sets where it would be really needed. And come to think of it, how did the *********** know to drop dead when he was expecting a swordfight? It all seems kinda fishy to me.

It was either that the swordsman had honestly honed his "death" reflexes so much that he just fell over on instinct (you need to do that if you ever do improv) or Ford did it once without blanks and confused everyone but Spielberg, who liked the idea and wrote it in for another take.

thats too many "if"s to even get it all realized, it even says they didnt refilm it, its obv its bs, something "that" interesting would had been told years ago evene as a way to hype up pppl for the film

Ifs to not make something impossible.
It just makes it more and more unlikely, yet the unlikely happens all the time.
People get attacked and killed by sharks
People get hit by lightning
People win the lottery
The unlikely happens weekly. It is not truly unlikely for it to be fake, especially given the circumstances. The actor playing Jones likely had a " **** this **** " attitude going on. Guns with blanks still make noise. The actor who had expected to be in a swordfight had likely done something similar to being shot with a gun in a past role or, at the very least, in training. He knew what to do when he heard the gun.

this is a slightly altered version of the true story. He actually had food poisoning, and he had discussed doing the scene like this with Spielberg prior to filming. So yes, you are right to question the preparedness of loading his gun with blanks prior to filming this scene.